D.K.C. Chan, P.W. Trinder and R.C. Welland, \Evaluating Object-Oriented Query Languages," Computer Journal, Vol.38, No.2, 1995. Home/Search Document Not in Database Summary Related Articles Check |
This paper is cited in the following contexts:
Supporting Array Types in Monoid Comprehensions - Alcantara, Buckles (1998) (3 citations) (Correct)
.... languages (e.g. 3] and at least one attempt to interpret collections in the context of relational query languages [5] In the object oriented database context, there exist an algebra calculus (generator free) approach [21] a mixed comprehension algebra approach [13] and a comprehension approach [9, 12] for expressing the semantics of collection based querying. One proposal representing the latter is the Monoid Comprehension Calculus [12] that has the property of capturing most of the operators that are commonly used in OODBs. For example, many of the most important features present in OQL of ....
.... rule (ii) two times: f [1] f [2] f [3] Developing f [1] f [1] x: square x j odd x] 1] substituting x: square 1 j odd 1] applying rule (vi) if odd 1 then [square 1 j ] else zero list applying rule (iv) unit list [square 1] 1] Similarly f [2] and f [3] [9]; then, finally, as expected: f [1] f [2] f [3] 1; 9] A final note before finishing the example. We have just seen that the process of reducing a comprehension is rather intricate; therefore, we have chosen to use the monoid calculus for its ability to give a unique meaning to the ....
D. K. C. Chan, P. Trinder, and R. Welland. Evaluating object-oriented query languages. The Computer Journal, 37(10):858--872, Nov. 1994.
A Processing Framework For Object Comprehensions - Chan, Trinder (1997) Self-citation (Chan Trinder) (Correct)
.... in that they are designed to be a user query language for object oriented databases [14] as opposed to just a vehicle for optimisation as in [30,19] or a notation for studying the theoretical foundation of query languages as in [7,17] The design criteria adopted are thoroughly discussed in [15]. A comparison of object comprehensions with ONTOS SQL [29] OSQL [24] O 2 SQL [3] ORION [21] EXCESS [8] OQL[C ] 6] CQL [16] and XSQL [20] can be found in [12] 3.2 Object Comprehensions Q0. Return names of staff earning less than 20000. set[ s StaffMembers; s.salary 20000 ....
....i:d = i; c:runBy ) 1 = c:credits c:credits = 3; Courses ) empty set ( nil ) Departments ) 19 7 Conclusions 7.1 Summary The research reported in this paper began with identifying the functional requirements of object oriented query languages. The 24 requirements presented in [15] are meaningful and constructive. They are meaningful because they can be used to evaluate and compare existing object oriented query languages. They are constructive because they can be used to improve existing query languages and direct the design of new query languages of which object ....
D.K.C. Chan, P.W. Trinder, and R.C. Welland. Evaluating Object-Oriented Query Languages. The Computer Journal, 37(10):858--872, 1994.
Object-Oriented Query Language Design and Processing - Chan (1994) Self-citation (Chan) (Correct)
....and Ray Welland. A fair amount of the materials presented in Chapter 2, 3, 4, and 8 of this thesis has been published before in various technical reports, workshop proceedings, conference proceedings, and the Computer Journal [TCH90, CHT92a, CHT92b, CT93, CHT93a, CHT93b, CK94, CT94a, CT94b, CTW95] All the papers involve more than one author and the co authors include Phil Trinder, David Harper, Ray Welland, and David Kerr. However the author is responsible for the majority of the technical substance of these papers and of this thesis. iv Acknowledgements It is a great pleasure to ....
....local definitions. 3. 5 Summary Example queries of the four query languages evaluated can be found in [CHT92b, CHT93a] Results of the evaluation of other query languages, e.g. EXCESS (EXODUS [CDV88] CQL (ODE [DGJ92] OQL[X] Zeitgeist [BTA90] and XSQL [KKS92] can be found in [CT93, CTW95] The new SQL3 proposal [Kul93] also includes many of the requirements. Existing object oriented query languages can be improved along the directions suggested by the requirements. It is also hoped that new query language design can benefit from this set of requirements. Comprehensions have been ....
D.K.C. Chan, P.W. Trinder, and R.C. Welland. Evaluating Object-Oriented Query Languages. The Computer Journal, 38(2), February 1995.
An Object-Oriented Query Model: An Algebraic Approach with Closure - Alhajj (1999) (Correct)
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D.K.C. Chan, P.W. Trinder and R.C. Welland, \Evaluating Object-Oriented Query Languages," Computer Journal, Vol.38, No.2, 1995.
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